US4587185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photomask for use in making a carrier tape
Assignee: Sumitomo Metal Mining Co Ltd
•
Filing: 1984-06-29
•
Granted: 1986-05-06
•
Expires: 2004-06-29
Abstract
Abstract A photomask for use in making a carrier tape used for automatically bonding IC devices on a substrate and having therealong sets of finger leads and sprocket holes, the carrier tape being made by exposing a metallic foil tape that is coated with a photo resist material to radiation which has passed through the photomask, the photomask including an elongated section which defines an elongated middle portion and opposite elongated outer portions, as well as at least one finger lead pattern in the middle portion and a pair of associated sprocket holes in the respective outer portions for each finger lead pattern, the pairs of sprocket holes being displaced longitudinally of the elongated section with respect to their associated finger lead pattern.
Inventors
- 👤 Shu Miyazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:53
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/01; H10W70/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
318 words
A photomask for use in making a carrier tape, said photomask consisting of a base element which includes an elongated section that is divided into an elongated middle portion and opposite elongated outer portions, said base element having a single finger lead pattern and a single pair of aligned sprocket hole patterns extending therethrough, said single finger lead pattern being located in said elongated middle portion of said elongated section and the sprocket hole patterns of said single pair of aligned sprocket hole patterns being respectively located in said opposite elongated outer portions of said elongated section, said single pair of aligned sprocket hole patterns being displaced along said elongated section from said single finger lead pattern a certain distance equal to one pitch or multiples thereof, said single finger lead pattern having no sprocket hole patterns located laterally outwardly thereof and said single pair of sprocket hole patterns having no finger lead pattern located laterally inwardly thereof; said photomask being positionable between a light source and a metallic foil tape having a photoresist material on a side thereof which faces said photomask such that light passing through said photomask can strike sequential portions of said photoresist material on said metallic foil tape and form finger lead clusters in a middle part thereof and aligned pairs of sprocket holes along opposite outer parts thereof, said metallic foil tape being provided with a succession of figure lead clusters formed in the middle part thereof which are separated by a distance equal to one pitch and, each finger lead cluster having a pair of aligned sprocket holes located laterally thereof along the length of said metallic foil tape, except for the number of figure lead clusters at the lead end of said metallic foil tape equal to the number of pitches the single pair of aligned sprocket hole patterns are spaced from the single figure lead pattern on said photomask.
Claim 2
Dependent Claim
318 words
A photomask for use in making a carrier tape, said photomask consisting of a base element which includes an elongated section that is divided into an elongated middle portion and opposite elongated outer portions, said base element having a single finger lead pattern and a single pair of aligned sprocket hole patterns extending therethrough, said single finger lead pattern being located in said elongated middle portion of said elongated section and the sprocket hole patterns of said single pair of aligned sprocket hole patterns being respectively located in said opposite elongated outer portions of said elongated section, said single pair of aligned sprocket hole patterns being displaced along said elongated section from said single finger lead pattern a certain distance equal to one pitch or multiples thereof, said single finger lead pattern having no sprocket hole patterns located laterally outwardly thereof and said single pair of sprocket hole patterns having no finger lead pattern located laterally inwardly thereof; said photomask being positionable between a light source and a metallic foil tape having a photoresist material on a side thereof which faces said photomask such that light passing through said photomask can strike sequential portions of said photoresist material on said metallic foil tape and form finger lead clusters in a middle part thereof and aligned pairs of sprocket holes along opposite outer parts thereof, said metallic foil tape being provided with a succession of figure lead clusters formed in the middle part thereof which are separated by a distance equal to one pitch and, each finger lead cluster having a pair of aligned sprocket holes located laterally thereof along the length of said metallic foil tape, except for the number of figure lead clusters at the lead end of said metallic foil tape equal to the number of pitches the single pair of aligned sprocket hole patterns are spaced from the single figure lead pattern on said photomask.
Claim 3
Dependent Claim
28 words
A photomask as defined in claim 1, wherein said single pair of sprocket holes is displaced with respect to said single finger lead pattern by one said pitch.
Claim 4
Dependent Claim
29 words
A photomask as defined in claim 1, wherein said single pair of sprocket holes is displaced with respect to said single finger lead pattern by multiples of said pitch.
Claim 5
Dependent Claim
295 words
A photomask for use in making a carrier tape, said photomask consisting of a base element which includes an elongated section that is divided into an elongated middle portion and opposite elongated outer portions, said base element having a plurality of aligned sprocket hole patterns extending therethrough, said finger lead patterns being located in said elongated middle portion of said elongated section and spaced apart a certain distance equal to one pitch or multiples thereof and the sprocket hole patterns of said pairs of aligned sprocket hole patterns being respectively located in said opposite elongated outer portions of said elongated section and said pairs of aligned sprocket hole patterns being spaced apart said certain distance, the finger lead pattern at one end of said elongated section having no pair of sprocket hole patterns located laterally outwardly thereof and the pair of sprocket hole patterns at the opposite end of said elongated section having no finger lead pattern located laterally inwardly thereof; said photomask being positionable between a light source and a metallic foil tape having a photoresist material on a side thereof which faces said photomask such that light passing through said photomask can strike sequential portions of said photoresist material on said metallic foil tape and form finger lead clusters in a middle part thereof and aligned pairs of sprocket holes along outer parts thereof, said metallic foil tape being thus provided with a succession of finger lead clusters formed in the middle part thereof which are separated by a distance equal to one pitch and, except for the first finger lead cluster at the lead end of said metallic foil tape, each finger lead cluster having a pair of aligned sprocket holes located laterally thereof along the length of said metallic foil tape.
Claim 6
Dependent Claim
295 words
A photomask for use in making a carrier tape, said photomask consisting of a base element which includes an elongated section that is divided into an elongated middle portion and opposite elongated outer portions, said base element having a plurality of aligned sprocket hole patterns extending therethrough, said finger lead patterns being located in said elongated middle portion of said elongated section and spaced apart a certain distance equal to one pitch or multiples thereof and the sprocket hole patterns of said pairs of aligned sprocket hole patterns being respectively located in said opposite elongated outer portions of said elongated section and said pairs of aligned sprocket hole patterns being spaced apart said certain distance, the finger lead pattern at one end of said elongated section having no pair of sprocket hole patterns located laterally outwardly thereof and the pair of sprocket hole patterns at the opposite end of said elongated section having no finger lead pattern located laterally inwardly thereof; said photomask being positionable between a light source and a metallic foil tape having a photoresist material on a side thereof which faces said photomask such that light passing through said photomask can strike sequential portions of said photoresist material on said metallic foil tape and form finger lead clusters in a middle part thereof and aligned pairs of sprocket holes along outer parts thereof, said metallic foil tape being thus provided with a succession of finger lead clusters formed in the middle part thereof which are separated by a distance equal to one pitch and, except for the first finger lead cluster at the lead end of said metallic foil tape, each finger lead cluster having a pair of aligned sprocket holes located laterally thereof along the length of said metallic foil tape.
References Cited (Backward Citations)
US4049903A
Cited
US4512843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |